1 /* 2 * NetLabel NETLINK Interface 3 * 4 * This file defines the NETLINK interface for the NetLabel system. The 5 * NetLabel system manages static and dynamic label mappings for network 6 * protocols such as CIPSO and RIPSO. 7 * 8 * Author: Paul Moore <paul.moore@hp.com> 9 * 10 */ 11 12 /* 13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006 14 * 15 * This program is free software; you can redistribute it and/or modify 16 * it under the terms of the GNU General Public License as published by 17 * the Free Software Foundation; either version 2 of the License, or 18 * (at your option) any later version. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 23 * the GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with this program; if not, write to the Free Software 27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 28 * 29 */ 30 31 #include <linux/init.h> 32 #include <linux/types.h> 33 #include <linux/list.h> 34 #include <linux/socket.h> 35 #include <linux/audit.h> 36 #include <linux/tty.h> 37 #include <linux/security.h> 38 #include <net/sock.h> 39 #include <net/netlink.h> 40 #include <net/genetlink.h> 41 #include <net/netlabel.h> 42 #include <asm/bug.h> 43 44 #include "netlabel_mgmt.h" 45 #include "netlabel_unlabeled.h" 46 #include "netlabel_cipso_v4.h" 47 #include "netlabel_user.h" 48 49 /* 50 * NetLabel NETLINK Setup Functions 51 */ 52 53 /** 54 * netlbl_netlink_init - Initialize the NETLINK communication channel 55 * 56 * Description: 57 * Call out to the NetLabel components so they can register their families and 58 * commands with the Generic NETLINK mechanism. Returns zero on success and 59 * non-zero on failure. 60 * 61 */ 62 int netlbl_netlink_init(void) 63 { 64 int ret_val; 65 66 ret_val = netlbl_mgmt_genl_init(); 67 if (ret_val != 0) 68 return ret_val; 69 70 ret_val = netlbl_cipsov4_genl_init(); 71 if (ret_val != 0) 72 return ret_val; 73 74 ret_val = netlbl_unlabel_genl_init(); 75 if (ret_val != 0) 76 return ret_val; 77 78 return 0; 79 } 80 81 /* 82 * NetLabel Audit Functions 83 */ 84 85 /** 86 * netlbl_audit_start_common - Start an audit message 87 * @type: audit message type 88 * @audit_info: NetLabel audit information 89 * 90 * Description: 91 * Start an audit message using the type specified in @type and fill the audit 92 * message with some fields common to all NetLabel audit messages. Returns 93 * a pointer to the audit buffer on success, NULL on failure. 94 * 95 */ 96 struct audit_buffer *netlbl_audit_start_common(int type, 97 struct netlbl_audit *audit_info) 98 { 99 struct audit_context *audit_ctx = current->audit_context; 100 struct audit_buffer *audit_buf; 101 char *secctx; 102 u32 secctx_len; 103 104 audit_buf = audit_log_start(audit_ctx, GFP_ATOMIC, type); 105 if (audit_buf == NULL) 106 return NULL; 107 108 audit_log_format(audit_buf, "netlabel: auid=%u", audit_info->loginuid); 109 110 if (audit_info->secid != 0 && 111 security_secid_to_secctx(audit_info->secid, 112 &secctx, 113 &secctx_len) == 0) 114 audit_log_format(audit_buf, " subj=%s", secctx); 115 116 return audit_buf; 117 } 118